空気散布式給炭機に関する研究(第2報)

概要

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Most of the nozzles used in pneumatic spreader stoker diverge horizontally and converge vertically in order to spread the fuel particles uniformly on a fire grate. This paper deals with the dependence of the diverging ratio and the form of nozz1e, which closely affect the spread states of fuel particles on a fire grate, upon the friction losses in the nozzle. The diverging ratio is defined as the ratio of cross section at the entrance of nozzle and that at the exit of nozzle. The following results were obtained. Optimum diverging ratio of nozzle is somewhere around 1.0,and optimum form is as follows; -1.5×10^<-2>>Ψ>-3×10^<-2> where Ψ=tan θ×tan ψ 2θ=diverging angle of nozzle in horizontal plane. 2ψ=diverging angle of nozzle in vertical plane, As long as the nozzle is not clogged with particles, the larger the ratio of the weight of particles to that of the air is, the less the losses in nozzle are.
社団法人日本機械学会の論文
1958-09-25